adding dependencies to handle inputs

new file:   .gitmodules
new file:   dep/cecho
finishing implementation
not compiling yet

modified:   pong.erl
	implemented: input_listener
	modified: read_config
		the initial position of the different objects are
		now specified
compiling project and adding config file

new file:   init_data.pong
	config file

modified:   pong.erl
	compilation fixing